Auxiliary air-inlet and primer for internal-combustion engines.



D. M. SHEEDY. AUXILIARY AIR INLET AND PRIMER FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. 12,1913

Patented Sept. 22, 1914.

2 vumutoz attorney Witnesses A? M- E3513 PATENT @FFICE.

UNITED STATES DANIEL I /L SHEEDY, 0F POUGHKEEPSIE, NEW YORK.

Specification of Letters Patent.

Patent-ed Sept. 22, 1914..

Application filed September 12, 1913. Serial No. 789,469.

'1 '0 all whom it may concern.

Be it known that I, Danna. M. SHELDY, a citizen of the United States, residing at Poughkee 'isie, in the eountyof Dutehess and State of New York, have invented certain new and useful Improvements in Auxiliary Airlnlets and Primers for Internal- (omhustion Engines; and I do declare the following to he a full. clear. and exact de scription of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to internal co1nbus tion engines the cylinders of which are supplied with gaseous fuel and air and more especially to an improved auxiliary air in let'device and primer for effecting a saving in fuel. l

The object of the invention is to provide a con'ihined auxiliary air inlet device and primer of this character which serves as a trap for the priming fluid and also as a heater for the incoming aiir.

Another object of the invention is to pro vide a simple and eilicient device of this character for admitting auxiliary air to the intake pipe or manifold of a gasolei'ie engine between the carburetor and the engine whereby the air and gaseous fluid are thoroughly mixed prior to the admission thereof into the engine to provide for the consumption of a minimum quantitv of fluid in the working of the engine without the loss of the requisite driving energy thus enabling the dillerent speeds to be obtained with the least possible amount of fuel supply.

\Yith these and other objects in view, the invention consists of certain novel features of cmistruction. and the combination and arrangement of parts as will he more fully de- :wrihcd and claimed.

In the accompanyingdrawings: Figure 1 repn-sentsa side elevation of this improved device shown applied to the manifold of an internal combustion enginewith parts of said manifold broken out and parts in seclion; Fig. 2 represents a plan view of that device with the manifold shown in horil zontal section: Fig. 3 is a detail vertical sec tion through the priming cup and the cm ol the pipe to which 1; is attached.

in the on hodiment illustrated. an cngin. manifold 1 is sh wn to which this improve. device is connected in any suitable maunc' the manifold being here shown provided with an internal threaded opening with which a threaded end of the attachment is engaged.

This improved device comprises a hollow casting 2 having a threaded neck 3 for insertion in the threaded opening in the manilold, said neck being, preferably provided with a collar l which abuts againstthe outer face of the manifold, a valve 5 is arranged in this casting and is provided with a stem (l for opening and closing, the valve. A coiled metal pipe 7 is connected at one end with the valve casing- 2 in advance of the valve. said casing being here shown provided with a mouth 8 in which the end of the pipe is secured in any suitable manner thereby providing communication between the pipe and the valve casing. The coils of this pipe. any desired number of which. may he cn'iployed. are arranged vertically as shown to provide a trap for the priming lluid for a purpose to be described. Two rolls are here shown in the pipe but more may he formed if desired. The larger'the number of rolls the greater will be the heat cfii-i-t on the air drawn in therethronglras these coils being metal lJQCOHIQ heated when the engine is in operation in a manner to he described. The free end 9 of the pipe 7 is .posod in upright position and the terminal thereof is exterior-iv threaded as sh wn at 10, said threaded end being here shown enlarged and a shoulder 11 provided on its inner face at a point spaced from its extreme outer end.

A priming cup l2 having an opening 13 in the bottom thereof is provided with a tubular internally threaded shank 14 which is adapted to he adjustahly connected with the cxtoriorly threaded end 9 o l the pipe 7. coiled spring I) is disposed in the end 9 of the pipe 7 and in the shanli l of the cup [2 and one end of said spring' rests against the shoulder 11 of the pipe end aiid the other end of said spring extends into said shank. ball valve It: is disposed between the outer end of the spring 15 and the inner end of the shank l4 being designed to normally lose the opening 13 in the priming cup, the spring 1:) holdin c said ball valve normally in closed position. The tension of this spring l?- !il;l he varied by adjusting the shan. 14 or" the ("up 12 on the thread 10 on the pipe end 1). it being obvious that when said shank is moved inward the tension of the spring will he increased and when it is ipoved outward it Wlll be reduced. The s. ank 14 is shown here provided with a wrench engaging face 17 for screwing the cup onto and off the pipe end.

In the use of this device when the threaded neck 3 has been engaged with the manifold 1, if the engine is already running, the valve 5 is opened to permit air to be drawn in through the cup 12 and the coils of the pipe 7 into the manifold which occurs on each suction stroke of the engine, the suction opening the valve 16 against the tension ofthe spring 15 and drawing in the desired quantity of air which. is to be mixed with the gaseous fuel in the manifold. The heat from the engine will be imparted to the manifold by conduction and from the manifold through the casting or valve casing 2 t0 the pipe 7 and consequently when the air isdrawn in through said pipe 7 it will be heated more or less before its entrance tothe manifold, thereby greatly increasing its efficiency.

W'lien difliculty is experienced in starting the motor such as frequently occurs in cold weather, it is desirable that a priming fluid be supplied with the gaseous fuel entering from the carburetor to enrich the charge drawn into the engine cylinder and a cup 12 here shown is especially designed for this purpose. The gasolene or other priming fluid is poured into the cup 12 and when the engine is cranked the suction thereof will open the valve 16 and draw the fluid into the pipe '7 through the coils thereof into the anifoid and it will be found that this additional fluid will effectively prime the engine for starting. The first suction stroke of the engine will draw in only a portion of the priming fluid as a part thereof will be held in the trap formed by the coils in the pipe and a second stroke of said engine piston will draw in additional fluid and thus insure the starting of the motor with little effort on the part of the operator.

hile I have described my invention with more or less minutcness as regards details and as being embodied in certain precise forms, I do not desire to be limited thereto unduly any more than is pointed out in the claim. On the contrary, I contemplate all proper changes in form, construction and arrangement, the omission of immaterial ele ments and substitution of equivalents as circumstances may suggest or render expedient.

I claim as my invention:

An auxiliary air inlet and primer for internal combustion engines comprising a hollow valved castinghaving means for connection with an engine manifold, a coiled metal pipe connected with said casting in advance of the valve thereof, and a valved priming cup mounted on the free end of said coiled pipe, the coils of said pipe being disposed in vertical position.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

DANIEL M. SHEEDY.

Viitnesses C. W. H. ARNOLD, J. E. Scrmrnnn. 

